arm64: dts: qcom: apq8039-t2: Drop inexistent property

'pin-switch-delay-us' is not used anywhere in the mainline kernel.
Drop it.

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Link: https://lore.kernel.org/r/20230627-topic-more_bindings-v1-4-6b4b6cd081e5@linaro.org


Signed-off-by: Bjorn Andersson <andersson@kernel.org>